JP2002517651A - Preventing sediment during oil recovery - Google Patents
Preventing sediment during oil recoveryInfo
- Publication number
- JP2002517651A JP2002517651A JP2000553697A JP2000553697A JP2002517651A JP 2002517651 A JP2002517651 A JP 2002517651A JP 2000553697 A JP2000553697 A JP 2000553697A JP 2000553697 A JP2000553697 A JP 2000553697A JP 2002517651 A JP2002517651 A JP 2002517651A
- Authority
- JP
- Japan
- Prior art keywords
- carboxyl
- scale
- fructan
- oil
- calcium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011084 recovery Methods 0.000 title abstract description 3
- 239000013049 sediment Substances 0.000 title description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 27
- 229920002670 Fructan Polymers 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical class [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 9
- 239000011575 calcium Substances 0.000 claims abstract description 9
- 229910052788 barium Inorganic materials 0.000 claims abstract description 6
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical class [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000002772 monosaccharides Chemical class 0.000 claims abstract description 4
- 230000008021 deposition Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 20
- 239000013535 sea water Substances 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 4
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 150000002505 iron Chemical class 0.000 claims 1
- 159000000008 strontium salts Chemical class 0.000 claims 1
- -1 carboxymethylinulin Chemical class 0.000 abstract description 9
- ZFTFOHBYVDOAMH-XNOIKFDKSA-N (2r,3s,4s,5r)-5-[[(2r,3s,4s,5r)-5-[[(2r,3s,4s,5r)-3,4-dihydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]oxymethyl]-3,4-dihydroxy-2-(hydroxymethyl)oxolan-2-yl]oxymethyl]-2-(hydroxymethyl)oxolane-2,3,4-triol Chemical class O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)OC[C@@H]1[C@@H](O)[C@H](O)[C@](CO)(OC[C@@H]2[C@H]([C@H](O)[C@@](O)(CO)O2)O)O1 ZFTFOHBYVDOAMH-XNOIKFDKSA-N 0.000 abstract description 6
- 150000003839 salts Chemical class 0.000 abstract description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract 1
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical class [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 10
- 239000002455 scale inhibitor Substances 0.000 description 10
- 239000002253 acid Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000005764 inhibitory process Effects 0.000 description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 230000002401 inhibitory effect Effects 0.000 description 5
- JYJIGFIDKWBXDU-MNNPPOADSA-N inulin Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)OC[C@]1(OC[C@]2(OC[C@]3(OC[C@]4(OC[C@]5(OC[C@]6(OC[C@]7(OC[C@]8(OC[C@]9(OC[C@]%10(OC[C@]%11(OC[C@]%12(OC[C@]%13(OC[C@]%14(OC[C@]%15(OC[C@]%16(OC[C@]%17(OC[C@]%18(OC[C@]%19(OC[C@]%20(OC[C@]%21(OC[C@]%22(OC[C@]%23(OC[C@]%24(OC[C@]%25(OC[C@]%26(OC[C@]%27(OC[C@]%28(OC[C@]%29(OC[C@]%30(OC[C@]%31(OC[C@]%32(OC[C@]%33(OC[C@]%34(OC[C@]%35(OC[C@]%36(O[C@@H]%37[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O%37)O)[C@H]([C@H](O)[C@@H](CO)O%36)O)[C@H]([C@H](O)[C@@H](CO)O%35)O)[C@H]([C@H](O)[C@@H](CO)O%34)O)[C@H]([C@H](O)[C@@H](CO)O%33)O)[C@H]([C@H](O)[C@@H](CO)O%32)O)[C@H]([C@H](O)[C@@H](CO)O%31)O)[C@H]([C@H](O)[C@@H](CO)O%30)O)[C@H]([C@H](O)[C@@H](CO)O%29)O)[C@H]([C@H](O)[C@@H](CO)O%28)O)[C@H]([C@H](O)[C@@H](CO)O%27)O)[C@H]([C@H](O)[C@@H](CO)O%26)O)[C@H]([C@H](O)[C@@H](CO)O%25)O)[C@H]([C@H](O)[C@@H](CO)O%24)O)[C@H]([C@H](O)[C@@H](CO)O%23)O)[C@H]([C@H](O)[C@@H](CO)O%22)O)[C@H]([C@H](O)[C@@H](CO)O%21)O)[C@H]([C@H](O)[C@@H](CO)O%20)O)[C@H]([C@H](O)[C@@H](CO)O%19)O)[C@H]([C@H](O)[C@@H](CO)O%18)O)[C@H]([C@H](O)[C@@H](CO)O%17)O)[C@H]([C@H](O)[C@@H](CO)O%16)O)[C@H]([C@H](O)[C@@H](CO)O%15)O)[C@H]([C@H](O)[C@@H](CO)O%14)O)[C@H]([C@H](O)[C@@H](CO)O%13)O)[C@H]([C@H](O)[C@@H](CO)O%12)O)[C@H]([C@H](O)[C@@H](CO)O%11)O)[C@H]([C@H](O)[C@@H](CO)O%10)O)[C@H]([C@H](O)[C@@H](CO)O9)O)[C@H]([C@H](O)[C@@H](CO)O8)O)[C@H]([C@H](O)[C@@H](CO)O7)O)[C@H]([C@H](O)[C@@H](CO)O6)O)[C@H]([C@H](O)[C@@H](CO)O5)O)[C@H]([C@H](O)[C@@H](CO)O4)O)[C@H]([C@H](O)[C@@H](CO)O3)O)[C@H]([C@H](O)[C@@H](CO)O2)O)[C@@H](O)[C@H](O)[C@@H](CO)O1 JYJIGFIDKWBXDU-MNNPPOADSA-N 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 229920001202 Inulin Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000008398 formation water Substances 0.000 description 4
- 229940029339 inulin Drugs 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical class OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 150000004676 glycans Chemical class 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229920001282 polysaccharide Polymers 0.000 description 3
- 239000005017 polysaccharide Substances 0.000 description 3
- 239000012047 saturated solution Substances 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- QEVGZEDELICMKH-UHFFFAOYSA-N Diglycolic acid Chemical compound OC(=O)COCC(O)=O QEVGZEDELICMKH-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000008351 acetate buffer Substances 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 1
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 125000004181 carboxyalkyl group Chemical class 0.000 description 1
- 230000021523 carboxylation Effects 0.000 description 1
- 238000006473 carboxylation reaction Methods 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- AIHDCSAXVMAMJH-GFBKWZILSA-N levan Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)OC[C@@H]1[C@@H](O)[C@H](O)[C@](CO)(CO[C@@H]2[C@H]([C@H](O)[C@@](O)(CO)O2)O)O1 AIHDCSAXVMAMJH-GFBKWZILSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229920001542 oligosaccharide Polymers 0.000 description 1
- 150000002482 oligosaccharides Chemical class 0.000 description 1
- PTMHPRAIXMAOOB-UHFFFAOYSA-N phosphoramidic acid Chemical class NP(O)(O)=O PTMHPRAIXMAOOB-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical compound [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 description 1
- PAYGMRRPBHYIMA-UHFFFAOYSA-N sodium;trihydrate Chemical compound O.O.O.[Na] PAYGMRRPBHYIMA-UHFFFAOYSA-N 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Fats And Perfumes (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compressor (AREA)
- Extraction Or Liquid Replacement (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Lubricants (AREA)
- Detergent Compositions (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Fuel-Injection Apparatus (AREA)
- Cyclones (AREA)
- Removal Of Floating Material (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
(57)【要約】 カルボキシメチルイヌリンのようなカルボキシル含有フラクタンは、採油において、例えば硫酸および炭酸のカルシウム、バリウムおよびストロンチウムの塩からなるスケールの堆積を防止するのに首尾よく使用できる。その際、単糖類１単位あたり０．３〜３個のカルボキシル基を含むカルボキシル含有フラクタンを、処理装置または含油層において、処理水に０．５〜２００ｐｐｍ加える。 (57) [Summary] Carboxyl-containing fructans, such as carboxymethylinulin, can be successfully used in oil recovery to prevent the deposition of scale, for example, of salts of calcium, barium and strontium sulfates and carbonates. At that time, 0.5 to 200 ppm of carboxyl-containing fructan containing 0.3 to 3 carboxyl groups per unit of monosaccharide is added to the treated water in the treatment apparatus or the oil-containing layer.
Description
【０００１】 本発明は、採油に際して金属塩が堆積することを防止する方法に関する。The present invention relates to a method for preventing metal salts from being deposited during oil extraction.
【０００２】 採油においては水が広く使用される。水は貯油層中に加圧下で注入される。岩
石中に存在する油は、短い距離離れた産油井戸中に水によって移動される。含油
岩は、地層水と称される水も含む。この地層水は、バリウム、カルシウムおよび
ストロンチウムのようなスケールを生成する可能性のある金属イオンを通常含有
する。これらの陽イオンは、ある種の条件下で不溶性の生成物を生成する。多く
の油田は沖合に位置しており、そこでは油を移動させるために海水が使用される
。海水は高濃度の硫酸塩イオンおよび炭酸塩イオンを含む。海水が地層水と混合
すると、硫酸バリウム、硫酸カルシウムおよび炭酸カルシウムのような不溶性の
塩が生成される。このことは、多孔性の岩石中のみならず、採油のために使用さ
れる配管および他の装置中での堆積をもたらす。地層水は放射性物質もまた含有
し、これは生成される堆積物中に取り込まれる。この結果、堆積物を除去する時
には、従業員および環境を保護するための手段を講じなければならない。[0002] Water is widely used in oil extraction. Water is injected under pressure into the reservoir. Oil present in rocks is transported by water into oil wells that are a short distance away. Oil-bearing rocks also contain water called formation water. This formation water usually contains metal ions that can produce scales such as barium, calcium and strontium. These cations produce insoluble products under certain conditions. Many oil fields are located offshore, where seawater is used to move oil. Seawater contains high concentrations of sulfate and carbonate ions. When seawater mixes with formation water, insoluble salts such as barium sulfate, calcium sulfate and calcium carbonate are formed. This results in deposition not only in porous rocks, but also in piping and other equipment used for oil recovery. Formation water also contains radioactive material, which is incorporated into the sediment produced. As a result, when removing sediment, measures must be taken to protect employees and the environment.
【０００３】 スケールの生成は、いろいろな方法で抑制することができる：[0003] Scale formation can be suppressed in a number of ways:
【０００４】 ａ）炭酸カルシウムスケールの場合、酸またはＣＯ2を添加することにより、平
衡を（可溶性の）重炭酸カルシウムへと移動させることができる。しかしながら
、酸の添加は所望の効果を示さず、これは、腐食が起きることに一部より、また
海水の緩衝作用のためである。ｐＨを十分に低くするために大量の酸が必要であ
り、その結果、この方法は経済的に魅力がない。A) In the case of the calcium carbonate scale, the equilibrium can be shifted to (soluble) calcium bicarbonate by adding acid or CO 2 . However, the addition of the acid does not have the desired effect, partly because corrosion occurs and due to the buffering of seawater. Large amounts of acid are required to lower the pH sufficiently, so that this method is not economically attractive.
【０００５】 ｂ）スケールを除去するために、周期的に装置を化学的または機械的に清掃する
ことができる。化学的清掃は強酸またはＥＤＴＡのような錯化剤を使用すること
により実施できる。これの不利な点は、岩石そのものの中での堆積はこの方法に
よっては対処できないということであり、またこの方法には環境上の欠点がある
。[0005] b) The device can be periodically cleaned chemically or mechanically to remove scale. Chemical scavenging can be performed by using a complexing agent such as a strong acid or EDTA. The disadvantage of this is that sedimentation in the rock itself cannot be addressed by this method, and this method has environmental disadvantages.
【０００６】 ｃ）堆積物の生成は、スケール抑制剤の使用によって防ぐことができる。これは
、結晶の成長を一部阻害することにより、スケールの生成を著しく減少する物質
である。このような抑制剤は、技術的なおよび経済的な見地から最も魅力的であ
る。C) Deposit formation can be prevented by the use of scale inhibitors. It is a substance that significantly reduces scale formation by partially inhibiting crystal growth. Such inhibitors are most attractive from a technical and economic point of view.
【０００７】 スケール抑制剤として提案されまた使用されている物質には、ポリアクリレー
ト、ポリアクリルアミド、アミノホスホネートおよびホスホネートがある。例え
ば、スケール抑制剤としていろいろなＮ−ホスホノメチル−ポリアミンを使用す
ることが、ＧＢ−Ａ２２４８８３０およびＷＯ９７／２１９０５中に記載されて
いる。このような製品の不利な点は、それが石油化学的な、従って、再生可能で
ない原料をベースとしており、生物分解性でなく、またあるものは水環境に対し
て毒性があることである。採油のために使用される化学的添加剤の環境上の側面
が果たす役割は、ますます増大している。このことは、北海での採油の場合、特
にあてはまる。製品は特に生物分解性および水に対する毒性を基準に格付けされ
、最高の格付け製品に対する選好がつよい。従って、環境的に良好なスケール抑
制剤に対する要求が増大している。さらに、既知の多くのスケール抑制剤、特に
ホスホネートは鉄イオンの存在で性能が低下し；パイプラインおよび装置の腐食
の結果として高濃度の鉄イオンが生じ、Ｆｅ（ＯＨ）3およびＦｅＣＯ3のような
鉄のスケールになる。[0007] Materials proposed and used as scale inhibitors include polyacrylates, polyacrylamides, aminophosphonates and phosphonates. For example, the use of various N-phosphonomethyl-polyamines as scale inhibitors has been described in GB-A 2 248 830 and WO 97/21905. The disadvantage of such a product is that it is based on petrochemical and therefore non-renewable raw materials, is not biodegradable, and some are toxic to the aquatic environment. The environmental aspects of the chemical additives used for oil production are playing an increasing role. This is especially true for North Sea oil production. The products are particularly rated on the basis of biodegradability and toxicity to water, and have a preference for the highest rated products. Accordingly, there is an increasing demand for environmentally good scale inhibitors. Moreover, many known scale inhibitors, especially phosphonates performance deteriorates in the presence of iron ions; highly concentrated iron ions occurs as a result of corrosion of pipelines and equipment, Fe (OH) as 3 and FeCO 3 Iron scale.
【０００８】 ＵＳ−Ａ４５６１９８２には、澱粉、セルロースおよびカルボキシメチルセル
ロースのような酸化された多糖類が、スケール抑制剤として提案されている。こ
れらの多糖類中のグルコース環の少なくともあるものは、式：−ＣＨ（ＣＯＯＨ
）−ＣＨＡ−Ｏ−ＣＨ（ＣＯＯＨ）−Ｏ−を有する基（ＡはＣＨ2ＯＨ、ＣＨ2Ｏ
ＣＨ2ＣＯＯＨまたはＣＯＯＨである）に酸化されている。提案されている用途
は、冷却水装置、デシルティング設備、地熱設備などにおけるものである。採油
および海水に関する言及はない。[0008] US-A 456 1982 proposes oxidized polysaccharides such as starch, cellulose and carboxymethylcellulose as scale inhibitors. At least some of the glucose rings in these polysaccharides have the formula: -CH (COOH
) -CHA-O-CH (COOH) -O-containing group (A is CH 2 OH, CH 2 O
CH 2 COOH or COOH). Proposed applications are in cooling water equipment, desilting equipment, geothermal equipment, and the like. There is no mention of oil and seawater.
【０００９】 採油および採ガスにおいて、スケールを抑制するための改良された薬剤に対す
る要求は、カルボキシル含有イヌリンおよび他のカルボキシル含有フラクタンを
使用することにより充足される。これらの誘導体は良好なスケール抑制作用を有
し、生物分解性でありまた非毒性であり、またこれらの性能は鉄イオンの存在で
影響をうけない。In oil and gas extraction, the need for improved agents to control scale is met by using carboxyl-containing inulin and other carboxyl-containing fructans. These derivatives have good scale-inhibiting action, are biodegradable and non-toxic, and their performance is not affected by the presence of iron ions.
【００１０】 ここで、フラクタンとは、アンヒドロフラクトース単位を多数有するオリゴ糖
および多糖類をすべて含むと了解される。フラクタンは多分散鎖長分布を有して
よく、また直鎖であっても分枝鎖であってよい。フラクタンはレバンにおけるよ
うにβ−２，６結合を主として含んでよい。フラクタンはイヌリンにおけるよう
にβ−２，１結合を含むのが好ましい。Here, it is understood that the fructan includes all oligosaccharides and polysaccharides having a large number of anhydrofructose units. Fractans may have a polydisperse chain length distribution and may be straight or branched. Fractans may contain predominantly β-2,6 bonds as in levan. Preferably, the fructan contains a β-2,1 linkage as in inulin.
【００１１】 また、カルボキシ含有フラクタンとは、アンヒドロフラクトース単位あたり０
．３〜３個のカルボキシル基を含む、イヌリンまたは他のフラクタンの誘導体で
あると了解される。特に、この誘導体はアンヒドロフラクトース単位あたり少な
くとも０．８個のカルボキシル基を含む。カルボキシル基は、カルボキシメチル
、カルボキシエチル、ジカルボキシメチルまたはカルボキシエトキシカルボニル
基のようなカルボキシアルキル基の形で存在してよい。これらは、既知の方法で
フラクタンのエーテル化によって得ることができる。カルボキシル基は酸化され
たヒドロキシメチレンまたはヒドロキシメチル基の形で存在してもよい。混合カ
ルボキシフラクタンも使用することができる。カルボキシメチル基の数は他のカ
ルボキシル基の数より多いのが好ましい。カルボキシメチルイヌリン（ＣＭＩ）
が最も好ましい。[0011] The carboxy-containing fructan is defined as 0 per anhydrofructose unit.
. It is understood to be a derivative of inulin or other fructans containing 3 to 3 carboxyl groups. In particular, this derivative contains at least 0.8 carboxyl groups per anhydrofructose unit. A carboxyl group may be present in the form of a carboxyalkyl group such as a carboxymethyl, carboxyethyl, dicarboxymethyl or carboxyethoxycarbonyl group. These can be obtained in known manner by etherification of the fractans. The carboxyl group may be present in the form of an oxidized hydroxymethylene or hydroxymethyl group. Mixed carboxyfractans can also be used. Preferably, the number of carboxymethyl groups is greater than the number of other carboxyl groups. Carboxymethylinulin (CMI)
Is most preferred.
【００１２】 ＤＳが０．１５〜２．５であるカルボキシメチルイヌリン（ＣＭＩ）は、ＷＯ
９５／１５９８４およびＪＡＯＣＳ、７３巻（１９９６年）、５５〜６２ページ
中のＶｅｒｒａｅｓｔらの文献に開示されている。これは、イヌリンの濃厚な溶
液をクロロ酢酸ナトリウムと高温で反応させることにより製造される。カルボキ
シエチルイヌリン（ＣＥＩ）はＷＯ９６／３４０１７中に開示されている。イヌ
リンの酸化は、例えば、ＷＯ９１／１７１８９およびＷＯ９５／１２６１９（Ｃ 3 〜Ｃ4の酸化、ジカルボキシイヌリン、ＤＣＩを生じる）、そしてＷＯ９５／０
７３０３（Ｃ6の酸化）に開示されている。混合カルボキシル誘導体の場合、イ
ヌリンは最初にカルボキシメチル化され、次いで酸化されるか、（望ましくは）
この逆である。Carboxymethylinulin (CMI) having a DS between 0.15 and 2.5 is described in WO
95/15984 and JAOCS, 73 (1996), 55-62.
In Verraest et al. This is a rich solution of inulin
Produced by reacting the liquid with sodium chloroacetate at elevated temperature. Carboki
Cyethylinulin (CEI) is disclosed in WO 96/34017. Dog
Oxidation of phosphorus is described, for example, in WO 91/17189 and WO 95/12619 (C Three ~ CFourOxidation, dicarboxyinulin, DCI) and WO 95/0
7303 (C6Oxidation). In the case of a mixed carboxyl derivative,
Nurin is first carboxymethylated and then oxidized, or (preferably)
The opposite is true.
【００１３】 カルボキシル含有フラクタンは少なくとも３の平均鎖長（重合度、ＤＰ）を有
し、これは約１０００に達する。平均鎖長が６〜６０の単糖類単位であるのが好
ましい。フラクタンは場合によっては、還元基を除去するために予め削減処理に
付してもよい。[0013] The carboxyl-containing fructan has an average chain length (degree of polymerization, DP) of at least 3, which amounts to about 1000. It is preferably a monosaccharide unit having an average chain length of 6 to 60. Fructan may optionally be subjected to a reduction treatment in advance to remove reducing groups.
【００１４】 本発明に従ってカルボキシアルキルフラクタンに添加される変性されたフラク
タン誘導体は、例えば、鎖長が酵素によって延長されているフラクタン、フラク
タンの加水分解生成物、つまり鎖が短くされたフラクタン誘導体、そして鎖の長
さが変更され分別された生成物である。イヌリンのようなフラクタンの分別は、
例えば低温結晶化（ＷＯ９４／０１８４９参照）、カラムクロマトグラフィー（
ＷＯ９４／１２５４１参照）、膜濾過（ＥＰ−Ａ４４００７４およびＥＰ−Ａ６
２７４９０参照）またはアルコールによる選択的沈殿によって実施される。より
短いフラクタンを生成するための先行する加水分解は、例えば酵素によって（エ
ンド−イヌリナーゼ）、化学的に（水および酸）または不均一接触作用（酸カラ
ム）によって実施することができる。本発明の方法では、カルボキシル化そして
適当なら酸化の後に、ヒドロキシアルキル化されたそして／あるいは架橋された
フラクタンを使用してもよい。Modified fractane derivatives added to carboxyalkylfractans according to the present invention include, for example, fractans whose chain length has been extended by enzymes, hydrolysis products of fractans, ie fractane derivatives with shortened chains, and It is a fractionated product with altered chain length. The separation of fructans like inulin
For example, low-temperature crystallization (see WO94 / 01849), column chromatography (
WO94 / 12541), membrane filtration (EP-A440074 and EP-A6)
27490) or by selective precipitation with alcohol. The preceding hydrolysis to produce shorter fractions can be carried out, for example, by enzymes (endo-inulinase), chemically (water and acids) or by heterogeneous catalysis (acid columns). In the process according to the invention, after carboxylation and, if appropriate, oxidation, hydroxyalkylated and / or crosslinked fructans may be used.
【００１５】 カルボキシメチルフラクタンは精製された物質の形で使用されてよいが、カル
ボキシメチル化によって直接得られる技術等級の製品を使用することもできる。
特に、グリコール酸およびジグリコール酸のようななんらかの不純物はＣＭＩの
作用に悪影響を及ぼさないことが分かっている。遊離の酸を使用できるが、ナト
リウム、カリウムまたはアンモニウム塩のような塩もまた使用できる。[0015] The carboxymethylfractane may be used in the form of a purified substance, but it is also possible to use technical grade products obtained directly by carboxymethylation.
In particular, it has been found that certain impurities, such as glycolic acid and diglycolic acid, do not adversely affect the action of CMI. Free acids can be used, but salts such as sodium, potassium or ammonium salts can also be used.
【００１６】 処理水中のカルボキシル含有フラクタン、特にＣＭＩの濃度は、一般に０．５
〜２００ｐｐｍ（重量部）そして特に２〜５０ｐｐｍである。カルボキシル含有
フラクタンとポリアクリレートまたはホスホネートのような他のスケール抑制剤
との混合物であって、他の抑制剤１部に対するカルボキシル含有フラクタンの比
率が、望ましくは少なくとも１部であるものを使用することもできる。The concentration of carboxyl-containing fructans, especially CMI, in the treated water is generally 0.5
２００200 ppm (parts by weight) and especially 2-50 ppm. It is also possible to use mixtures of carboxyl-containing fractans with other scale inhibitors such as polyacrylates or phosphonates, wherein the ratio of carboxyl-containing fractans to 1 part of the other inhibitors is preferably at least 1 part. it can.
【００１７】 スケール抑制剤は海水に添加され、そして含油地層中にこのようにしてポンプ
で送り込まれる。この抑制剤を、多量の堆積物が生成する、処理装置の特定の場
所に導入することができる。抑制剤を、油井の底にある流体内に連続的に注入す
ることもできる。さらに別な技術は『スクイーズ』技術であり、この場合、抑制
剤は岩石に導入される。抑制剤は沈殿し、そして／あるいは地層によって吸着さ
れる。スケールの生成を防ぐために、十分な抑制剤が脱着によって経時的に放出
される。数カ月の後、スケール抑制剤の貯留物は使い切られ、そしてこの過程が
反復される。この応用法は、海上での採油に限定されることはなく、海上のみな
らず陸上において、水が移動剤として使用される他の採取過程にも関する。[0017] A scale inhibitor is added to the seawater and is thus pumped into the oily formation. This inhibitor can be introduced at a specific location in the processing equipment where a large amount of deposits is formed. Inhibitors can also be injected continuously into the fluid at the bottom of the well. Yet another technique is the "squeeze" technique, in which an inhibitor is introduced into the rock. The inhibitor precipitates and / or is adsorbed by the formation. Sufficient inhibitor is released over time by desorption to prevent scale formation. After several months, the pool of scale inhibitors is exhausted and the process is repeated. This application is not limited to oil harvesting at sea, but also to other harvesting processes where water is used as a transfer agent, not only at sea, but also on land.
【００１８】 （実施例１） 炭酸カルシウムに関するＣＭＩ（ＤＰ≒１０）のスケール抑制作用を測定した
。塩化カルシウム溶液を炭酸ナトリウム溶液と混合することにより、生成すべき
炭酸カルシウムの量が最大で９５ｍｇ／ｌとなるよう炭酸カルシウムの飽和溶液
をつくった。溶液に１ｍｇ／ｌまたは５ｍｇ／ｌの抑制剤を添加した。溶液のｐ
Ｈを１０．０に調整し、次いで７５℃において撹拌しつつ傍らに置いた。２０時
間の後、Ｗｈｉｔｅ Ｂａｎｄフィルターを通じて溶液を濾過し、そして濾液の
カルシウム含有率を測定した。抑制剤を用いない実験（０％の抑制）に関するカ
ルシウムの値、及び沈殿が認められない（１００％の抑制）ときのカルシウムの
値に基づいて、抑制剤の作用を計算した。表１に示されるような結果が得られた
。Example 1 The scale inhibitory effect of CMI (DP # 10) on calcium carbonate was measured. By mixing the calcium chloride solution with the sodium carbonate solution, a saturated solution of calcium carbonate was made such that the amount of calcium carbonate to be produced was at most 95 mg / l. 1 mg / l or 5 mg / l inhibitor was added to the solution. Solution p
The H was adjusted to 10.0 and then set aside at 75 ° C. with stirring. After 20 hours, the solution was filtered through a White Band filter and the calcium content of the filtrate was measured. The effect of the inhibitor was calculated based on the calcium value for the experiment without inhibitor (0% inhibition) and the calcium value when no precipitation was observed (100% inhibition). The results as shown in Table 1 were obtained.
【００１９】[0019]
【表１】 [Table 1]
【００２０】 （実施例２） 硫酸カルシウムに関するＣＭＩ（ＤＰ≒１０）のスケール抑制作用を測定した
。塩化カルシウム溶液を硫酸ナトリウム溶液と混合することにより、生成すべき
硫酸カルシウムの量が最大で１０，０００ｍｇ／ｌとなるよう硫酸カルシウムの
飽和溶液をつくった。溶液に１ｍｇ／ｌ、５ｍｇ／ｌまたは１０ｍｇ／ｌの抑制
剤を添加した。溶液のｐＨを７．０に調整し、次いで３０℃で静置した。２０時
間の後、Ｒｅｄ Ｂａｎｄフィルターを通じて溶液を濾過し、そして濾液のカル
シウム含有率を測定した。抑制剤を用いない実験（０％の抑制）のカルシウムの
値、及び沈殿が認められない（１００％の抑制）ときのカルシウムの値に基づい
て、抑制剤の作用を計算した。表２に示されるような結果が得られた。Example 2 The scale inhibiting effect of CMI (DP # 10) on calcium sulfate was measured. By mixing the calcium chloride solution with the sodium sulfate solution, a saturated solution of calcium sulfate was made such that the amount of calcium sulfate to be produced was at most 10,000 mg / l. To the solution was added 1 mg / l, 5 mg / l or 10 mg / l of inhibitor. The pH of the solution was adjusted to 7.0 and then left at 30 ° C. After 20 hours, the solution was filtered through a Red Band filter and the calcium content of the filtrate was measured. The effect of the inhibitor was calculated based on the calcium value in the experiment without inhibitor (0% inhibition) and the calcium value when no precipitation was observed (100% inhibition). The results as shown in Table 2 were obtained.
【００２１】[0021]
【表２】 [Table 2]
【００２２】 （実施例３） 溶液を２０時間後でなく７日後に濾過した以外は、実施例２（硫酸カルシウム
スケール抑制剤）をくり返した。結果を表３に示す。Example 3 Example 2 (a calcium sulfate scale inhibitor) was repeated except that the solution was filtered after 7 days rather than 20 hours. Table 3 shows the results.
【００２３】[0023]
【表３】 [Table 3]
【００２４】 （実施例４） 硫酸バリウムに関するＣＭＩ（ＤＰ≒１０）のスケール抑制作用を測定した。
塩化バリウム溶液（３８０ｍｇ／ｌ）を硫酸ナトリウム溶液（３３５０ｍｇ／ｌ
）と１：１の比率で混合することにより、生成すべき硫酸バリウムの量が最大で
２１０ｍｇ／ｌとなるよう硫酸バリウムの飽和溶液をつくった。溶液に５ｍｇ／
ｌ、１０ｍｇ／ｌまたは１５ｍｇ／ｌの抑制剤を添加した。１００ｍｌあたり１
ｍｌのアセテート緩衝剤（１００ｍｌあたり１３．６ｇの三水和酢酸ナトリウム
と０．５ｇの酢酸）を添加することにより、溶液のｐＨを５．５に調整した。次
いで８０℃で静置した。１０時間の後、０．４５μｍのＭｉｌｌｉｐｏｒｅフィ
ルターを通じて吸引することにより溶液を濾過し、そして濾液のバリウム含有率
を測定した。抑制剤を用いない実験（０％の抑制）のバリウムの値、及び沈殿が
認められない（１００％の抑制）ときのバリウムの値に基づいて、抑制剤の作用
を計算した。結果を表４に示す。Example 4 The scale inhibiting effect of CMI (DP # 10) on barium sulfate was measured.
A barium chloride solution (380 mg / l) was added to a sodium sulfate solution (3350 mg / l).
) To produce a saturated solution of barium sulfate such that the amount of barium sulfate to be produced is at most 210 mg / l. 5 mg /
1, 10 mg / l or 15 mg / l of inhibitor was added. 1 per 100ml
The pH of the solution was adjusted to 5.5 by adding ml of acetate buffer (13.6 g sodium trihydrate and 0.5 g acetic acid per 100 ml). Then, it was left still at 80 ° C. After 10 hours, the solution was filtered by suction through a 0.45 μm Millipore filter and the barium content of the filtrate was measured. The effect of the inhibitor was calculated based on the barium value of the experiment without inhibitor (0% inhibition) and the barium value when no precipitation was observed (100% inhibition). Table 4 shows the results.
【００２５】[0025]
【表４】 [Table 4]
【００２６】 （実施例５） 硫酸バリウム溶液が３８ｍｇ／ｌのＦｅ2+イオンを含んでいること以外は、実
施例４をくり返した。結果を表５に示す。Example 5 Example 4 was repeated except that the barium sulfate solution contained 38 mg / l of Fe 2+ ions. Table 5 shows the results.
【００２７】[0027]
【表５】 [Table 5]
───────────────────────────────────────────────────── フロントページの続き (81)指定国 ＥＰ(ＡＴ，ＢＥ，ＣＨ，ＣＹ， ＤＥ，ＤＫ，ＥＳ，ＦＩ，ＦＲ，ＧＢ，ＧＲ，ＩＥ，Ｉ Ｔ，ＬＵ，ＭＣ，ＮＬ，ＰＴ，ＳＥ)，ＯＡ(ＢＦ，ＢＪ ，ＣＦ，ＣＧ，ＣＩ，ＣＭ，ＧＡ，ＧＮ，ＧＷ，ＭＬ， ＭＲ，ＮＥ，ＳＮ，ＴＤ，ＴＧ)，ＡＰ(ＧＨ，ＧＭ，Ｋ Ｅ，ＬＳ，ＭＷ，ＳＤ，ＳＬ，ＳＺ，ＵＧ，ＺＷ)，Ｅ Ａ(ＡＭ，ＡＺ，ＢＹ，ＫＧ，ＫＺ，ＭＤ，ＲＵ，ＴＪ ，ＴＭ)，ＡＥ，ＡＬ，ＡＭ，ＡＴ，ＡＵ，ＡＺ，ＢＡ ，ＢＢ，ＢＧ，ＢＲ，ＢＹ，ＣＡ，ＣＨ，ＣＮ，ＣＵ， ＣＺ，ＤＥ，ＤＫ，ＥＥ，ＥＳ，ＦＩ，ＧＢ，ＧＤ，Ｇ Ｅ，ＧＨ，ＧＭ，ＨＲ，ＨＵ，ＩＤ，ＩＬ，ＩＮ，ＩＳ ，ＪＰ，ＫＥ，ＫＧ，ＫＰ，ＫＲ，ＫＺ，ＬＣ，ＬＫ， ＬＲ，ＬＳ，ＬＴ，ＬＵ，ＬＶ，ＭＤ，ＭＧ，ＭＫ，Ｍ Ｎ，ＭＷ，ＭＸ，ＮＯ，ＮＺ，ＰＬ，ＰＴ，ＲＯ，ＲＵ ，ＳＤ，ＳＥ，ＳＧ，ＳＩ，ＳＫ，ＳＬ，ＴＪ，ＴＭ， ＴＲ，ＴＴ，ＵＡ，ＵＧ，ＵＳ，ＵＺ，ＶＮ，ＹＵ，Ｚ Ａ，ＺＷ──────────────────────────────────────────────────続 き Continuation of front page (81) Designated country EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE ), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR , BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS , JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZA, ZW
Claims (11)
カルボキシル含有フラクタンが、処理装置または含油層において、処理水に加え
られることを特徴とする、ポリカルボキシ化合物を用いた採油におけるスケール
の堆積を防止する方法。1. A monosaccharide containing 0.3 to 3 carboxyl groups per unit,
A method for preventing scale deposition in oil extraction using a polycarboxy compound, wherein a carboxyl-containing fructan is added to treated water in a treatment device or an oil-containing layer.
ましくは２〜５０ｐｐｍまでの処理水中に加えられる請求項に１記載の方法。2. The process according to claim 1, wherein the carboxyl-containing fraction is added to the treated water in an amount of 0.5 to 200 ppm, preferably 2 to 50 ppm.
とも０．８個のカルボキシル基を含む請求項１または２に記載の方法。3. The method according to claim 1, wherein the carboxyl-containing fructan contains at least 0.8 carboxyl groups per monosaccharide unit.
〜２．５個のカルボキシメチル基を含む請求項１〜３のいずれか１項に記載の方
法。4. The method according to claim 1, wherein the carboxyl-containing fructan is present in an amount of 0.7
4. The method according to any one of claims 1 to 3, comprising from to 2.5 carboxymethyl groups.
るカルボキシメチルイヌリンである請求項１〜４のいずれか１項に記載の方法。5. The method according to claim 1, wherein the carboxyl-containing fructan is carboxymethylinulin having an average degree of polymerization of 6 to 60.
ウム塩を含む請求項１〜５のいずれか１項に記載の方法。6. The method according to claim 1, wherein the scale comprises a calcium, barium and / or strontium salt.
のいずれか１項に記載の方法。7. The scale according to claim 1, wherein the scale contains carbonate and / or sulfate.
The method according to any one of claims 1 to 4.
方法。8. The method according to claim 1, wherein the scale comprises an iron salt.
成物が使用される請求項１〜８のいずれか１項に記載の方法。9. The process as claimed in claim 1, wherein the product obtained directly from the carboxyalkylation of the fructan is used.
求項１〜８のいずれか１項に記載の方法。10. The process according to claim 1, wherein a purified carboxyalkylfractane is used.
の方法。11. The method according to claim 1, wherein the treated water is seawater.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1009356 | 1998-06-09 | ||
| NL1009356A NL1009356C2 (en) | 1998-06-09 | 1998-06-09 | Method for preventing deposits in oil extraction. |
| PCT/NL1999/000358 WO1999064716A1 (en) | 1998-06-09 | 1999-06-09 | Method for preventing deposits in oil extraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002517651A true JP2002517651A (en) | 2002-06-18 |
Family
ID=19767280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000553697A Pending JP2002517651A (en) | 1998-06-09 | 1999-06-09 | Preventing sediment during oil recovery |
Country Status (23)
| Country | Link |
|---|---|
| US (1) | US6613899B1 (en) |
| EP (1) | EP1093541B2 (en) |
| JP (1) | JP2002517651A (en) |
| CN (1) | CN1119500C (en) |
| AT (1) | ATE241080T1 (en) |
| AU (1) | AU748920B2 (en) |
| BG (1) | BG105034A (en) |
| BR (1) | BR9910996A (en) |
| CA (1) | CA2334782C (en) |
| DE (1) | DE69908128T2 (en) |
| DK (1) | DK1093541T3 (en) |
| ES (1) | ES2197691T3 (en) |
| HU (1) | HUP0102433A3 (en) |
| ID (1) | ID26821A (en) |
| IL (1) | IL140086A0 (en) |
| MX (1) | MXPA00012232A (en) |
| NL (1) | NL1009356C2 (en) |
| NO (1) | NO318085B1 (en) |
| NZ (1) | NZ508679A (en) |
| PT (1) | PT1093541E (en) |
| RU (1) | RU2234596C2 (en) |
| TR (1) | TR200003659T2 (en) |
| WO (1) | WO1999064716A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| KR20120001762A (en) * | 2009-03-17 | 2012-01-04 | 데퀘스트 아게 | Composition for inhibiting calcium salt scale formation |
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| NL1009379C2 (en) † | 1998-06-11 | 1999-12-15 | Cooperatie Cosun U A | Dispersant. |
| NL1014985C2 (en) * | 2000-04-19 | 2001-10-24 | Co Peratie Cosun U A | Sequestering. |
| EP1304158A1 (en) * | 2001-10-09 | 2003-04-23 | Tiense Suikerraffinaderij N.V. | Hydrophobically modified saccharide surfactants |
| FR2897362B1 (en) * | 2006-02-13 | 2008-04-18 | Inst Francais Du Petrole | METHOD OF TREATING WELLS WITH SMALL SIZE EMULSIONS CONTAINING ADDITIVES |
| DK2148908T3 (en) * | 2007-05-08 | 2018-03-26 | Solvay Usa Inc | POLYSACCHARID-BASED STONE INHIBITORS |
| US7977283B2 (en) * | 2008-06-27 | 2011-07-12 | Baker Hughes Incorporated | Method of minimizing or reducing salt deposits by use of a fluid containing a fructan and derivatives thereof |
| WO2010041033A2 (en) * | 2008-10-10 | 2010-04-15 | Halliburton Energy Services, Inc. | Geochemical control of fracturing fluids |
| US8881811B2 (en) | 2008-10-10 | 2014-11-11 | Halliburton Energy Services, Inc. | Additives to suppress silica scale build-up and methods of use thereof |
| US20100089578A1 (en) | 2008-10-10 | 2010-04-15 | Nguyen Philip D | Prevention of Water Intrusion Into Particulates |
| US9010430B2 (en) | 2010-07-19 | 2015-04-21 | Baker Hughes Incorporated | Method of using shaped compressed pellets in treating a well |
| US10822536B2 (en) | 2010-07-19 | 2020-11-03 | Baker Hughes, A Ge Company, Llc | Method of using a screen containing a composite for release of well treatment agent into a well |
| US9976070B2 (en) | 2010-07-19 | 2018-05-22 | Baker Hughes, A Ge Company, Llc | Method of using shaped compressed pellets in well treatment operations |
| US9012376B2 (en) | 2011-03-14 | 2015-04-21 | Halliburton Energy Services, Inc. | Inulin as corrosion inhibitor |
| US8664168B2 (en) | 2011-03-30 | 2014-03-04 | Baker Hughes Incorporated | Method of using composites in the treatment of wells |
| US20130269937A1 (en) * | 2012-04-12 | 2013-10-17 | Halliburton Energy Services, Inc. | Acidizing Fluids Comprising a Salt Block Inhibitor and Methods for Use Thereof |
| US9950937B1 (en) * | 2012-09-25 | 2018-04-24 | Stephen R. Temple | Methods for treating liquid streams containing quaternary ammonium compounds |
| US9963366B2 (en) * | 2013-03-15 | 2018-05-08 | Stephen R. Temple | Methods for treating liquid streams containing quaternary ammonium compounds |
| WO2016014310A1 (en) | 2014-07-23 | 2016-01-28 | Baker Hughes Incorporated | Composite comprising well treatment agent and/or a tracer adhered onto a calcined substrate of a metal oxide coated core and a method of using the same |
| US10641083B2 (en) | 2016-06-02 | 2020-05-05 | Baker Hughes, A Ge Company, Llc | Method of monitoring fluid flow from a reservoir using well treatment agents |
| US10413966B2 (en) | 2016-06-20 | 2019-09-17 | Baker Hughes, A Ge Company, Llc | Nanoparticles having magnetic core encapsulated by carbon shell and composites of the same |
| CA3053753A1 (en) * | 2017-02-27 | 2018-08-30 | General Electric Company | Sulfate scale inhibition in high pressure and high temperature applications |
| US11254861B2 (en) | 2017-07-13 | 2022-02-22 | Baker Hughes Holdings Llc | Delivery system for oil-soluble well treatment agents and methods of using the same |
| CA3079526C (en) | 2017-11-03 | 2022-06-28 | Baker Hughes, A Ge Company, Llc | Treatment methods using aqueous fluids containing oil-soluble treatment agents |
| US10961444B1 (en) | 2019-11-01 | 2021-03-30 | Baker Hughes Oilfield Operations Llc | Method of using coated composites containing delayed release agent in a well treatment operation |
| US11655413B2 (en) * | 2021-02-04 | 2023-05-23 | Saudi Arabian Oil Company | Methods for removing sulfate ions from seawater to form injection fluids |
| US11746280B2 (en) * | 2021-06-14 | 2023-09-05 | Saudi Arabian Oil Company | Production of barium sulfate and fracturing fluid via mixing of produced water and seawater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2557473A (en) † | 1947-10-14 | 1951-06-19 | Phillips Petroleum Co | Drilling fluids and methods of using same |
| US3411580A (en) * | 1966-09-28 | 1968-11-19 | Byron Jackson Inc | Mud removal method |
| US3596766A (en) * | 1969-03-28 | 1971-08-03 | Nat Lead Co | Scale inhibition |
| JPS5976598A (en) * | 1982-10-25 | 1984-05-01 | Mitsubishi Gas Chem Co Inc | Scale inhibiting agent |
| FR2570753B1 (en) * | 1984-09-25 | 1986-12-12 | Schlumberger Cie Dowell | NEW APPLICATIONS OF SCLEROGLUCANE AS A FLUID FOR CLEANING PIPES OF OIL INSTALLATIONS |
| FR2570755B1 (en) * | 1984-09-25 | 1986-11-21 | Schlumberger Cie Dowell | NOVEL APPLICATIONS OF SCLEROGLUCANE IN THE FIELD OF TREATING HYDROCARBON WELLS AS SUSPENSION AGENT FOR SOLID PARTICLES OR BUBBLES |
| GB2248830A (en) * | 1990-10-04 | 1992-04-22 | Britoil Plc | Method for inhibiting scale formation |
| NL9302163A (en) * | 1993-12-10 | 1995-07-03 | Univ Delft Tech | Carboxymethylated oligo and polysaccharides as crystallization inhibitors. |
| NL1003776C2 (en) * | 1996-08-09 | 1998-02-20 | Cooperatie Cosun U A | Environmentally friendly heavy metal complexants |
| NL1004738C2 (en) * | 1996-12-10 | 1998-06-11 | Cooperatie Cosun U A | Fructan polycarboxylic acid. |
-
1998
- 1998-06-09 NL NL1009356A patent/NL1009356C2/en not_active IP Right Cessation
-
1999
- 1999-06-09 EP EP99955517A patent/EP1093541B2/en not_active Expired - Lifetime
- 1999-06-09 HU HU0102433A patent/HUP0102433A3/en unknown
- 1999-06-09 DK DK99955517T patent/DK1093541T3/en active
- 1999-06-09 IL IL14008699A patent/IL140086A0/en unknown
- 1999-06-09 RU RU2001101453/03A patent/RU2234596C2/en active
- 1999-06-09 ID IDW20002539A patent/ID26821A/en unknown
- 1999-06-09 CN CN99807192A patent/CN1119500C/en not_active Expired - Fee Related
- 1999-06-09 CA CA002334782A patent/CA2334782C/en not_active Expired - Lifetime
- 1999-06-09 TR TR2000/03659T patent/TR200003659T2/en unknown
- 1999-06-09 WO PCT/NL1999/000358 patent/WO1999064716A1/en not_active Application Discontinuation
- 1999-06-09 ES ES99955517T patent/ES2197691T3/en not_active Expired - Lifetime
- 1999-06-09 NZ NZ508679A patent/NZ508679A/en unknown
- 1999-06-09 AU AU42938/99A patent/AU748920B2/en not_active Expired
- 1999-06-09 AT AT99955517T patent/ATE241080T1/en not_active IP Right Cessation
- 1999-06-09 MX MXPA00012232A patent/MXPA00012232A/en active IP Right Grant
- 1999-06-09 JP JP2000553697A patent/JP2002517651A/en active Pending
- 1999-06-09 US US09/719,239 patent/US6613899B1/en not_active Expired - Lifetime
- 1999-06-09 BR BR9910996-4A patent/BR9910996A/en active Search and Examination
- 1999-06-09 PT PT99955517T patent/PT1093541E/en unknown
- 1999-06-09 DE DE69908128T patent/DE69908128T2/en not_active Expired - Fee Related
-
2000
- 2000-12-05 NO NO20006173A patent/NO318085B1/en not_active IP Right Cessation
- 2000-12-08 BG BG105034A patent/BG105034A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120001762A (en) * | 2009-03-17 | 2012-01-04 | 데퀘스트 아게 | Composition for inhibiting calcium salt scale formation |
| JP2012524172A (en) * | 2009-03-17 | 2012-10-11 | デクエスト アーゲー | Composition for inhibiting calcium salt scale formation |
| KR101701532B1 (en) * | 2009-03-17 | 2017-02-01 | 이탈마치 케미칼스 에스피에이 | Composition for inhibiting calcium salt scale formation |
Also Published As
| Publication number | Publication date |
|---|---|
| BG105034A (en) | 2001-09-28 |
| ES2197691T3 (en) | 2004-01-01 |
| AU748920B2 (en) | 2002-06-13 |
| AU4293899A (en) | 1999-12-30 |
| HUP0102433A2 (en) | 2001-10-28 |
| MXPA00012232A (en) | 2003-04-25 |
| BR9910996A (en) | 2001-02-13 |
| RU2234596C2 (en) | 2004-08-20 |
| NO20006173L (en) | 2001-02-07 |
| ID26821A (en) | 2001-02-15 |
| EP1093541B2 (en) | 2010-08-25 |
| HUP0102433A3 (en) | 2003-01-28 |
| DE69908128D1 (en) | 2003-06-26 |
| EP1093541A1 (en) | 2001-04-25 |
| NO318085B1 (en) | 2005-01-31 |
| CN1119500C (en) | 2003-08-27 |
| IL140086A0 (en) | 2002-02-10 |
| NZ508679A (en) | 2003-02-28 |
| DK1093541T3 (en) | 2003-06-23 |
| ATE241080T1 (en) | 2003-06-15 |
| NO20006173D0 (en) | 2000-12-05 |
| NL1009356C2 (en) | 1999-12-10 |
| US6613899B1 (en) | 2003-09-02 |
| WO1999064716A1 (en) | 1999-12-16 |
| TR200003659T2 (en) | 2001-06-21 |
| CA2334782A1 (en) | 1999-12-16 |
| DE69908128T2 (en) | 2003-12-18 |
| EP1093541B1 (en) | 2003-05-21 |
| PT1093541E (en) | 2003-09-30 |
| CA2334782C (en) | 2007-12-18 |
| CN1305563A (en) | 2001-07-25 |
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